Rotary engine.



Patented May 7, IBM.

D. MORELL.

ROTARY ENGINE.

(Apolieation filed Dec. 24, 1900.) {No Model.) 2 Sheets-Sheet l.

No. 673,648. Patented May 7, JUL D. MORELL.

ROTARY ENGINE.

(Application filed Dec. 24, 1900.)

(No Iodel.) 2 Sheets--Shoet 2.

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UNITED STATES PATENT OFFICE.

DAVID MORELL, OF CASSEL, GERMANY.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 673,648, dated May 7, 1901.

Application filed December 24, 1900. Serial No. 40.912. (No model.)

To all whom it may concern:

Be it known that I, DAVID MORELL, engineer and manufacturer, a citizen of the German Empire, residing at 37 Wilhelmshoher Allee, Oassel, in the German Empire, have invented new and useful Improvements in R- tary Engines, of which the followingisaspecification.

In rotary engines, to which this invention relates, it has been found very diflicult to provide an efficient packing between the side surfaces of the rotary pistons or vanes and the cylinder-walls. It is undesirable that any steam should be able to pass between these parts or that any braking action should be set up. It has been attempted to provide a packing by inserting loose plates between the cylinderwalls and the piston or vanes and to press these plates against the moving parts by means of strong springs; but these springs had to be sufficiently strong to overcome the highest pressure in the motor. Consequently the springs exerted a braking action on the moving parts Whenever the normal or lower pressure existed.

According to my present improvements I also use the loose plates between the piston or vanes and the cylinder-walls, but in combination with springs which are just strong enough to maintain the piston and plates in contact. I supplement the springs by employing the steam-pressure in the engine to exert its force on the plates in the direction of the piston or vanes, so that the pressure exerted upon the plates will always correspond with the steam-pressure in the engine.

In the accompanying drawings, to which reference will be hereinafter made, Figure 1 shows an elevation of the cylinder cover broken away on the right-hand side to show one of the loose plates. Fig. 2 represents the cylinder-cover as seen from the inside, the loose plate being removed. Fig. 3 isa sectional plan of the cover and loose plate. Fig. 4 shows a section along the line A B, Fig. 1. Fig. 5 shows a cross-section of the cock for regulating the steam-pressure between the cover and loose plate. Figs. 6 and 7 show a section taken along the line F G, Fig. 5, two positions of the screw-plug. Fig. 8 shows the loose plate as seen from the side facing the cylinder-cover.

Fig. 9 shows the plate, then a braking action would be set up on the low-pressure side of the piston in consequence of the high pressure between the loose plates and the cylinder-covers. To prevent this result,Idivide the space between the loose plate and the cover into the portions by the means hereinafter described. In the space on the inlet side the steam acts under full pressure, while in the space in the exhaust side it acts in its expanded condition. By enlarging and diminishing the areas of the inlets and outlets of these spaces the pressures, indicated by gages, may be regulated.

In the drawings, a indicates the loose plate, which is quite flat on the piston side and is provided with three projections n n on the opposite side. These projections have central holes, into which holes 0 radial thereto extend. The piston-rods pass through the openings 1) b and are supported by bushes c 0. Weak springs 01 d are provided in cavities in the cylinder-cover, Fig. 3, and serve to keep the plate in light contact with the piston. The communication between the interior of the cylinder and the space between the loose plate and the cylinder-cover is effected by means of screw-plugs e e f, which have each a central bore and a radial-branch bore therefrom. The radial bore of each plug coincides in one position with the radial bore 0 of the projection n of the plate a. As shown by Figs. 2, 3, and 4, grooves are formed in the cylinder-cover and are fitted with small slides g h h, having between them and the bottoms of the grooves small springs m m. These slides are in contact with the loose plates and form the division between the two spaces lying between the loose plate and the cylinder cover, hereinbefore referred to. Since the plate a fits closely to the cylindercover, communication between the spaces on either side of g h h and the interior of the cylinder can only be eifected through the screw-plugs e c'f. As the steam is able to act only on the surface of the plate which is not covered by the piston the pressure on the opposite side of the piston will be greater, as here the steam acts on the whole surface. The difference in the pressures exerted forces the plate a against the piston-surfaces.

When steam or like enters the engine, it passes at the same time through the screw plug f into the space between the plate and cover and forces the plate against the piston. The pressure being lower on the exhaust side, this side of the loose plate a should be less forcibly pressed against the piston, so as to avoid any braking action. This effect is produced by the arrangement of the spring-controlled slides g h h, which allow the pressuresteam to pass slowly only, so that it must expand in the second space. By adjusting the screw-plugs e e the admission of steam to the second space can be more or less retarded, and thus by this means the pressure in the second space can be controlled.

The screw-plug f is used to control the pressure of steam on the inlet side. Pressure-gages may be arranged at 70 7c.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a rotary engine, the combination with the cylinder and its piston or vanes, of a loose plate between the cylinder-cover and the piston, partitions on said plate dividing the space between the plate and the cylinder-cover into compartments, and one or more controllable ports between the interior of the cylinder and each compartment.

2. In a rotary engine, the combination with the cylinder and its piston or vanes, of a loose plate between the cylinder-cover and the piston, partitions resting loosely on said plate and dividing the space between the plate and the cylinder-cover into compartmen ts,and one 'or more valves between the interior of the cylinder and each compartment.

3. In a rotary engine, the combination with the cylinder and its piston or vanes, pf a loose plate between the cylinder-cover and the piston, partitions movable away from said plate and dividing the space between the plate and the cylinder-cover into compartments,and one or more controllable ports between the interior of the cylinder and each compartment.

4:. In a rotary engine, the combination with the cylinder and its piston or vanes, of a loose plate between the cylinder-cover and the piston, partitions resting loosely on said plate and dividing the space between the plate and the cylinder-coverinto compartments,springs pressing said partitions yieldingly against said plate, and one or more controllable ports between the interior of the cylinder and each compartment.

5. In rotary engines, provided with loose plates between the cylinder-covers and the piston, screw-plugs such as e, e f, communieating on one side with the high-pressure and with the low-pressure parts of an engine respectively, and on the other side with two corresponding spaces between the plate and the cylinder-cover, substantially as and for the purpose hereinbefore described and as illustrated by the accompanying drawings.

In witness whereof I have hereunto signed my name, this 8th day of November, 1900, in the presence of two subscribing witnesses.

' DAVID MORELL. [L. s]

Witnesses:

CARL HoHMANN, J USTUS NEEDERHOLT. 

